Webster's English Dictionary

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residential

res.i.den.tial \.rez(-*)-'den-ch*l\ \-dench-(*-)le-\ aj 1a: used as a 
   residence or by residents  1b: providing living accommodations for students 
   {a ~ college}  2: restricted to or occupied by residences  3: of or 
   relating to residence or residences  - res.i.den.tial.ly av